LG Ultrafine 4K Ambient Light Sensor

Discussion in 'Mac Accessories' started by anferro, Dec 2, 2016.

  1. anferro macrumors newbie

    Joined:
    Dec 1, 2016
    #1
    How do I activate the ambient light sensor on the LG Ultrafine 4k from Macbook 15" 2016 with OS Sierra?. In preferences / screen you can only change the brightness manually. Thanks
     
  2. Brookzy macrumors 601

    Brookzy

    Joined:
    May 30, 2010
    Location:
    UK
    #2
    I have the same question. My LG UltraFine doesn't seem to be adjusting brightness automatically. Does anyone know?
     
  3. ABCDEF-Hex, Dec 12, 2016
    Last edited: Dec 12, 2016

    ABCDEF-Hex macrumors 6502

    ABCDEF-Hex

    Joined:
    Feb 15, 2013
    Location:
    NC
    #3
    I did find this but it may be old information.
    Or it may not be recognizing the sensor on the display (if it even has one)?

    How to Automatically Adjust Brightness Based on Ambient Light
    Macs with built-in ambient light sensors can monitor the light level nearby and automatically adjust the display’s brightness level to be suitable. This means making the display brighter when it’s bright near you, and making the screen dimmer when you’re in the dark.

    To find this option, open the System Preferences window from the Apple menu and select “Displays.” Enable “Automatically adjust brightness” and your Mac will use the ambient light sensor to automatically adjust the brightness. Disable this option and your Mac won’t do this.

    [​IMG]

    If you don’t see this option here at all, your Mac doesn’t have an ambient light sensor.

    Despite the name, this option only applies to the ambient light sensor. Even if you disable the “Automatically adjust brightness” option, your Mac will still dim the display when you’re on battery power if you have the “Slightly dim the display while on battery power” option enabled.

    Using the automatic brightness features won’t stop you from being able to adjust the brightness manually. If you ever don’t like the current brightness level, you can change it with a few keypresses. However, your Mac may automatically increase or decrease the brightness level if the lightning near you changes, and you may have to tweak it again.
     
  4. Brookzy, Dec 12, 2016
    Last edited: Dec 12, 2016

    Brookzy macrumors 601

    Brookzy

    Joined:
    May 30, 2010
    Location:
    UK
    #4
    This option doesn't show for the LG UltraFine:

    Screen Shot 2016-12-12 at 17.51.48.png

    The brightness is adjustable using an external keyboard however.

    It just doesn't seem to be adjusting automatically.

    I've found the full manual online (it only comes with a quick start guide in the box), and it confirms the dot on the top is an ambient light sensor.

    Screen Shot 2016-12-12 at 17.56.38.png

    It also says:

    Screen Shot 2016-12-12 at 17.56.53.png

    Screen Shot 2016-12-12 at 17.59.12.png

    Which implies the ALS is driven by macOS somehow. Perhaps the functionality will be added in the next point release?

    And I've checked and the monitor's firmware is up to date, so it isn't that.
     
  5. winstonc macrumors newbie

    Joined:
    Apr 13, 2015
    #5
    Just updated to 10.12.2 on my 2015 Macbook and the automatic option has not appeared with the update. Also checked and my monitor seems up to date as well.
     
  6. Brookzy macrumors 601

    Brookzy

    Joined:
    May 30, 2010
    Location:
    UK
    #6
    Same. Ambient light sensor simply not working, not even in 10.12.2.
     
  7. sctw macrumors newbie

    sctw

    Joined:
    Jun 8, 2016
    #7
    Same for me as well. Hopefully on the next update?
     
  8. LxHunter macrumors 6502

    Joined:
    Nov 14, 2010
    #8
    Anyone fine a solution to this.
    Bought the 4K last week
    And still missing the auto adjust
     
  9. samdale67 macrumors newbie

    samdale67

    Joined:
    Sep 26, 2012
    Location:
    Fort Worth, Texas
    #9
    I'm on 10.13.2 Beta (17C83a) and still no "Automatically adjust brightness" option.
     
  10. RobinInOR macrumors 6502

    RobinInOR

    Joined:
    Sep 14, 2014
    #10
    Mine doesn’t adjust either and what’s more, if I tone it down so it doesn't blind me, the next time I wake the MBP it goes right back to its brightest setting.
     
  11. brosenz macrumors regular

    brosenz

    Joined:
    Apr 26, 2011
    #11
    I have the exact same problem, currently running the latest macOS 10.13.3 and the latest LG Screen Manager 2.9, no automatic bright adjustment either
     
  12. MrX8503 macrumors 68020

    Joined:
    Sep 19, 2010
    #12
    The hardware is there, but the software isn't. LG hasn't indicated that they'll be supporting it in a future update.
     
  13. jimthing macrumors 65816

    jimthing

    Joined:
    Apr 6, 2011
    Location:
    London, UK
    #13
    Where have they indicated that?

    Both the 4K and 5K displays have been out well over a year, and they've released bugger all updates to it!
    (Although AFAIR, they did fix the USB-C ports speeds and the sound control.)

    Pretty poor to have to wait a ridiculous time for this, when the hardware is there.
     
  14. meeme123, Jun 8, 2018
    Last edited: Jun 8, 2018

    meeme123 macrumors newbie

    Joined:
    Jun 8, 2018
    #14
    LG is infamous for never ever updating their products. Tricked again :(

    But I too have the hope to see this update in the future. This monitor absolutely burns my eyes on the high brightness settings. Adjusting brightness between day/night sunny/cloudy is a pain. One thing I'm wondering is if the ambient light sensor is even a real thing or an oversight in the documentation.

    I used this link to let them know and so should you (the monitor product number is 22MD4KA-B also send them a link to this thread): https://www.lg.com/us/support/email-appointment
     
  15. butterburger cookybutter, Jul 13, 2018
    Last edited: Jul 18, 2018

    butterburger cookybutter macrumors member

    butterburger cookybutter

    Joined:
    Aug 5, 2016
    #15
    LG Apple is infamous for stagnant pipeline. Tee hee.

    At last, this feature which they planned two years ago, now is ready for use (Purchase of new Mac required.). Yessir, seven seasons after UltraFine Display were announced (at 2016 October), MacBook Pro (2018) can use the light sensor component for True Tone. (I presume also automatic brightness adjustment will be enabled.)

    edit 2018-07-18 add:
    This post is misleading misinformation, proven wrong.
     
  16. jimthing macrumors 65816

    jimthing

    Joined:
    Apr 6, 2011
    Location:
    London, UK
    #16
    This is utterly false advertising to me! How on earth do they think it's acceptable to make said functionality available ONLY on the 2018 MBP?!
    They advertised such an important feature that works on these 5K's on their initial release with the 2016 MBP's, only for it to NEVER be turned on, then this BS! Good am I livid.
     
  17. Brookzy macrumors 601

    Brookzy

    Joined:
    May 30, 2010
    Location:
    UK
    #17
    I'm pretty sure the ambient light sensor still does not work. The True Tone on the UltraFine display is based on the readings of the MacBook Pro's colour sensor.
     
  18. jimthing macrumors 65816

    jimthing

    Joined:
    Apr 6, 2011
    Location:
    London, UK
    #18
    Sure the 2016/17 don't have TT, so obviously no one would expect that.

    But really, why do I have to manually adjust each display's brightness manually on my 2016 model, instead of them all just following and mirroring the MBP's sensor...?? (via a simple on/off check box in Display prefs!) How hard can that be.
     
  19. toniwonkanobi macrumors newbie

    toniwonkanobi

    Joined:
    Jul 25, 2018
    Location:
    Northern California
    #19
    So there's *still* no hardware/software/driver support for the ambient light sensor in the UltraFines on macOS?
     
  20. velum macrumors newbie

    Joined:
    Sep 18, 2008
    Location:
    Montréal (Qc), Canada
    #20
    I know this screen is meant to be hooked up to a recent Apple machine, but I have it hooked up to a Linux box; an Ubuntu 16.04 desktop to be more precise. While I was trying to adapt this project and to compile it on Ubuntu (https://github.com/csujedihy/LG-Ultrafine-Brightness), the ambient light sensor of my LG UltraFine 4K display got activated. I don't know how, because I also compiled the code on a Windows 10 machine, and it worked to adjust the brightness, but it never activated the ambien light sensor, and in fact, the code does not even contain anything to activate the sensor. On top of that, I have since then unplugged the display and re-plugged it, and I was not able to reproduce the behavior.

    What I wanted to say though, is that while the ambient light sensor "feature" was activated, I was able to experiment a bit with it, and it did not seem to work well. It was during the day, but there was not much sunlight coming into the room. It was even a bit dark, and the sensor would constantly change the brightness of the screen as if it would be hesitating between two values. If I would shine a flashlight on the sensor, then it would bring the screen to full brightness. And if I would put a finger on the sensor to block all light, it would completely dim the display, and it would go completely black. So I would never want to use the ambient light sensor event if I were able to re-activate it. It does not work well at all. My guess, is that the light sensor never worked properly on those displays, and this is why Apple is not showing the Automatically Adjust Brightness option for these screens.
     
  21. toniwonkanobi macrumors newbie

    toniwonkanobi

    Joined:
    Jul 25, 2018
    Location:
    Northern California
    #21
    So none of this code has anything to do with the sensor? https://github.com/csujedihy/LG-Ultrafine-Brightness/blob/master/LG-Ultrafine-Brightness/main.cpp
     
  22. velum macrumors newbie

    Joined:
    Sep 18, 2008
    Location:
    Montréal (Qc), Canada
    #22

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